1
4
5
7
9
2
7
9
8
9
2
1
3
2
8
5
9
7
5
4
8
1
8
7
5
4
6
7
2
7
4
8
9
6

This Sudoku Puzzle has 49 steps and it is solved using Naked Single, Full House, Hidden Single, Uniqueness Test 1, Avoidable Rectangle Type 1 techniques.

Try To Solve This Puzzle

Solution Steps:

1. Row 5 / Column 1 → 6 (Naked Single)
2. Row 1 / Column 2 → 3 (Naked Single)
3. Row 2 / Column 1 → 8 (Naked Single)
4. Row 7 / Column 1 → 9 (Full House)
5. Row 4 / Column 3 → 1 (Naked Single)
6. Row 5 / Column 5 → 3 (Naked Single)
7. Row 2 / Column 3 → 6 (Naked Single)
8. Row 3 / Column 3 → 2 (Full House)
9. Row 9 / Column 3 → 3 (Full House)
10. Row 4 / Column 2 → 4 (Naked Single)
11. Row 6 / Column 2 → 7 (Full House)
12. Row 5 / Column 6 → 9 (Naked Single)
13. Row 2 / Column 4 → 3 (Naked Single)
14. Row 4 / Column 4 → 6 (Naked Single)
15. Row 6 / Column 5 → 2 (Full House)
16. Row 2 / Column 6 → 4 (Naked Single)
17. Row 2 / Column 7 → 7 (Full House)
18. Row 4 / Column 7 → 2 (Naked Single)
19. Row 4 / Column 8 → 9 (Full House)
20. Row 9 / Column 6 → 8 (Naked Single)
21. Row 3 / Column 6 → 6 (Naked Single)
22. Row 9 / Column 2 → 1 (Naked Single)
23. Row 7 / Column 2 → 8 (Full House)
24. Row 1 / Column 5 → 5 (Naked Single)
25. Row 1 / Column 8 → 6 (Full House)
26. Row 9 / Column 4 → 5 (Naked Single)
27. Row 3 / Column 4 → 1 (Naked Single)
28. Row 3 / Column 5 → 8 (Full House)
29. Row 8 / Column 4 → 9 (Full House)
30. Row 8 / Column 5 → 1 (Naked Single)
31. Row 9 / Column 5 → 4 (Naked Single)
32. Row 9 / Column 8 → 7 (Full House)
33. Row 7 / Column 5 → 6 (Full House)
34. Row 6 / Column 7 → 6 (Hidden Single)
35. Row 7 / Column 8 → 1 (Hidden Single)
36. Row 5 / Column 8 → 5 (Naked Single)
37. Row 5 / Column 7 → 1 (Full House)
38. Uniqueness Test 1: 3/4 in r3c89,r6c89 => r3c9<>3, r3c9<>4
39. Row 3 / Column 9 → 5 (Naked Single)
40. Row 3 / Column 7 → 3 (Naked Single)
41. Row 3 / Column 8 → 4 (Full House)
42. Row 8 / Column 7 → 5 (Full House)
43. Row 6 / Column 8 → 3 (Full House)
44. Row 6 / Column 9 → 4 (Full House)
45. Avoidable Rectangle Type 1: 3/5 in r3c79,r8c79 => r8c9<>3
46. Row 8 / Column 9 → 2 (Naked Single)
47. Row 7 / Column 9 → 3 (Full House)
48. Row 8 / Column 6 → 3 (Full House)
49. Row 7 / Column 6 → 2 (Full House)